ISSN 1305-3825 | E-ISSN 1305-3612
Original Article
A comparative analysis of noncontrast flow-spoiled versus contrast-enhanced magnetic resonance angiography for evaluation of peripheral arterial disease
1 Department of Cardiovascular and Interventional Radiology, Heart of England NHS Foundation Trust, Birmingham, United Kingdom  
2 Departments of Cardiovascular Radiology, Heart of England NHS Trust, Birmingham, West Midlands, United Kingdom  
Diagn Interv Radiol 2013; 19: 119-125
DOI: 10.4261/1305-3825.DIR.5896-12.1
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Abstract

PURPOSE 
This feasibility study aimed to obtain initial data to assess the performance of a novel noncontrast spoiled magnetic resonance (MR) angiography technique (fresh-blood imaging [FBI]) compared to gadolinium-enhanced MR (Gd-MR) angi- ography for evaluation of the aorto-iliac and lower extremity arteries. 

 

MATERIALS AND METHODS 
Thirteen patients with suspected lower extremity arterial dis- ease that had undergone Gd-MR angiography and FBI at the same session were randomly included in the study. FBI was performed using an ECG-gated ow-spoiled T2-weighted half-Fourier fast spin-echo sequence. For analysis, the aorto- iliac and lower limb arteries were divided into 18 anatomi- cal segments. Two blinded readers individually graded image quality of FBI and also assessed the presence and severity of any stenotic lesions. A similar analysis was performed for the Gd-MR angiography images. 

 

RESULTS 
A total of 385 arterial segments were analyzed; 34 segments were excluded due to degraded image quality (1.3% of Gd- MR vs. 8% of FBI-MR angiography images). FBI-MR angiography had comparable accuracy to Gd-MR angiography for assess- ment of the above knee vessels with high kappa statistics (large arteries, 0.91; small arteries, 0.86) and high sensitivity (large arteries, 98.1%; small arteries, 88.6%) and speci city (large arteries, 97.2%; small arteries, 97.6%) using Gd-MR angiography as the gold standard. 

 

CONCLUSION 
Initial results show good agreement between FBI-MR angiography and Gd-MR angiography in the diagnosis of peripheral arterial disease, making FBI a potential alternative in patients with renal impairment. FBI showed highest accuracy in the above knee vessels. Technological re nements are required to improve accuracy for assessing the calf and pedal vessels

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